We do have Dropbox support, but it’s currently disabled while we sort out some theoretical security concerns.

Specifically, we let you load Milkdrop visualizer plugins via a query param, but that involves arbitrary js execution. We have a solution that we've built and shipped, we just haven't yet disabled the old system.

More info on the Wasm compiler we built as part of that solution can be found at my blog: https://jordaneldredge.com/blog/speeding-up-winamps-music-vi...